Default value of cascadeOpacityEnabled should be YES #841
Description
Version: 3.1
I think cascadeOpacityEnabled of CCNode should be YES by default.
While animating a CCButton using CCActionFadeOut, I noticed that the button doesn't fade out because opacity isn't cascaded.
In the user's mindset, a button is a whole entity and we want to treat it as such when dealing with opacity.
In fact, I think in most cases user will want cascadeOpacityEnabled to be YES, not only limited to CCButton.
If there is a good reason why the default value is NO, please enlighten me. Thanks a lot.